Search Results Use the search box below to revise your search, or start a new search. Studies (6) Variables Publications Your query returned 4 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. National Education Longitudinal Study, 1988 (ICPSR 9389) United States Department of Education. National Center for Education Statistics 2 more results in National Education Longitudinal Study of 1988 (NELS) Series 2. National Senior Citizens Survey, 1968 (ICPSR 7626) Schooler, Kermit 3. Quality of American Life, 1971 (ICPSR 3508) Campbell, Angus; Converse, Philip E.; Rodgers, Willard L. 4. Swedish Adoption/Twin Study on Aging (SATSA), 1984, 1987, 1990, 1993, 2004, 2007, and 2010 (ICPSR 3843) Pedersen, Nancy L.